<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

    <style>

        div{

            border: 1px solid red;

            line-height: 50px;

            height: 100px;

            width: 100px;


        }
    </style>
</head>
<body>


<div>
    欢迎来到今日头条

</div>

</body>
</html>